Oil filter



C. A. COMPTON OIL FILTER Filed Sept. 17, 1934 2 Sheets-Sheet 1 INVENTOR.CHA/aufs A. CoM/Dran,

. z ATTORNEYS.

Dec. 29, 1936.

Dec. 29, 1936. Q A, COMPTON 2,065,658

' on. FILTER FiledSep't. 17, 1954 2 Sheets-Sheet 2 a f Ei i1 x n a n l 1NToR. CHARLES oMPro/v A TT ORNEYS.

BYMMWQL?! UNITED STATES PATENT ori-ica 2,065,658 v on. mima Charles A.Compton, Menlo Park, Calif. Application September 17, 1934, Serial No.744,433 5 Claims. (01.'210-1f10) My invention relates to improvements inoil filters, and it consists vof the combinations, constructions andarrangements hereinafter described and claimed.

An object of my invention is to provide an oil filter which isanimprovement over the filter shown in my Patent No. 1,927,229'issuedSeptember 19, 1932. In the patent I showed an oil filter in which thewall of the casing was inclined inwardly for directing oil flowing alongthe wall of the casing toward the filtering medium.

In the present invention I provide deilecting members for directing theiiow of oil inwardly toward the filtering medium, and this does awaywith the necessity of bending a portion of the casing inwardly.

A further object of my invention is to provide a device of the typedescribed in which the oil is I fed into the bottom of the-casing, andthen is caused to flow downwardly toward the bottom of the casing, andthen upwardly toward the outlet end which is disposed at the top of thecasing. The oil in iiowing upwardly toward the outlet passes through anumber of filtering means, and is directed upwardly and toward thecenterof the casing so that all of the oil must pass through thefiltering means. I

The filtering means can be provided in a cartridge which may beVremovably disposed in the casing, and this permits the ltering means tobe renewed from time to time by merely substituting a new cartridge forthe old one. For a less expensive lter, the filtering means can beplaced directly in the casing, without the removable cartridge.

Novel means' is provided for cleaning the filtering means while thelatter still remains in the casing.v y

Other objects and advantages will appear in the following specification,and the novel features of the device will be particularly pointed out inthe appended claims.

My invention is illustrated in the accompany--4 ing drawings forming apart of this application, in which Figure 1 is a section through thefilter and shows the filter operatively connected to an internalcombustion engine;

Figure 2 is a top plan view of Figure 1; Figure 3 is a section throughthe removable cartridge: Y

4Figure 4 is a section through a modiiied form of the device:l l

Flgure5isatopplanviewotFlgure4;

Figure 6 is a detailed section through a part of the modified form; and

Figure 7 is a perspective view of one of the oil deiiecting rings. 4

In Figures 1 to 3 inclusive, I show a casing 5 which is made from acasting, and I further show a removable cartridge disposed in thecasing, and this cartridge carries the iiltering means. In Figures 4 to7 inclusive I show a more inexpensive filter in which the filteringmeans is placed di- 10 rectly in the casing and the removable cartridgeis dispensed with. The casing in the form shown in yFigure 4 ispreferably stamped from sheet metal.

Referring to the form shown in Figures 1 to 3 15 inclusive, I provide a`casing I which is preferably a casting, and this casing has a shoulder 2for supporting a gasket 3, and has a shoulder 4 for supporting a secondgasket 5. A cover 6 is secured tothe casing by screws 'I or othersuitable 20 fastening means, and the cover carries a plug 8, see Figure1, which may be removed for purposes of cleaning the interior ofthecasing. The bottom 9 of the casing is provided with a plug I0" which mayalso be removed for cleaning purposes. 25

Within the casing I removably dispose a cartridge indicated generally atI I, in vFigure 3. This cartridge has a shoulder I 2 that rests on thegasket 5. The bottom of the cartridge is closed by a screen I3, and thisscreen has an opening I4 30 in its center. A defiector I5 is secured tothe screen I3 and directs oil owing from an inlet pipe I6 downwardlytoward the bottom 9 of the casing. The opening I4 receives the top ofthe oil inlet pipe I6. l d 35 Again referring to the cartridge in Figure3 it will be seen that I provide an oil deflecting ring I1, this ringcontacting with the wall of the cartridge, and having its upper edgecurved inwardly at I8 for directing oil toward the center of the 40cartridge. A screen I9 is placed beneath the inwardly curved edge IB,and rests on a filtering medium 20 disposed between the screens I3 andI9.

are disposed one above the other, and have in-` wardly curved upperedges 23 and 24, and these edges enclose screens 25 and 26, and thescreens rest upon a filtering medium 21 and 28.

A large filtering pad 29 is mounted on top of 50 the screen 26, and thepad rests upon the shoulder I2, and its marginal edge contacts with thecartridge wall. A ring 3 0 is placed on the pad and forces the pad edgeagainst the shoulder vI2 and against vthe casing. wall that is disposedabove the 55 In like manner oil deflecting rings 2I and 22 45 as thescreen 32. The cartridge is removably disposed in the casing I and takesthe position shown in Figure 1. As alreadystated the shoulder I2 restson the gasket 4. 'I he cover 33 bears against the gasket 35, and whenthe casing cover 6 is fastened in position the two gaskets 4 and 35 andthe gasket 3 will seal the cartridge so that oil cannot pass between thecasing wall and the cartridge wall.

Figure 1 also shows one way of connecting the fllterwith an internalcombustion engine, indicated generally at 36. An oil pump showndlagrax'nmatically at 31 pumps oil from the engine 36 into a pipe 38,that communicates with the pipe I6. A shut-0E valve 39 is placed in thepipe 38.` A return pipe 40 leads from the top of the -casing I and isconnected to the Acover; 6. This pipe 40 conveys the filtered oil backto the engine. A valve 4I is placed in the pipe 40. I further show aby-pass 42 connecting the pipes 38 and 4II t0-A gether, and a shut-01Tvalve 43 is placed in the pipe. i

From the foregoing description of the various parts of the device, theoperation thereof may be readily understood.

When theengine operates, oil will flow out from the pipe I6 and will bedeilected downwardly by the deilector I5. The oil will then change itscourse and will flow upwardly and around the outside of the deflector I5and up through the ltering materials and nally out through the outlet40. The arrows in Figures 1 and 4 show the ilow of oil. The change ofoil ow from a downward to an upward direction causes the foreignparticles to settle to the bottom 9 and to remain there until the lteris washed. The oil.

through the various filtering layers. The oil is prevented from flowingalong the wall of the cartridge because of the oil deflecting edges Ionthe rings. The oil is thoroughly cleaned as it passes through theltering means, and is returned through the pipe 40 backto the engine.

To get best results, the illter should be washed out each time the caris greased or every one or two thousand miles. When cleaning the filterwithout removing the cartridge the valves 39 and 4I are shut, and thevalve 43 is opened. The plugs B-and I0 are now removed and sulcientkerosene is poured through the opening provided by the removed plug 8 towash the filter material and to wash the sediment from the bottom 9. I

have found that about two quarts of keroseneis necessary and a funnel isused in order to direct this kerosene through the opening in the cover6. The'plug 8 is now put back in place and the engine 36 is started, andis allowed torun until the loil flowing through the pipe 39. the branchpipe 42. and the pipe 49, will enter the top of the casing I and willrst ush out the kerosene through the opening in the bottom 9, and thennally the oil itself will start to flow through the opening. Whenapproximately one quart of oil is withdrawn in this manner, the engineis stopped and the plug I0 is reinserted. The valves 39 and v4I are nowopened, and the valve 43' is closed. The

amount of oil removed from the illter is nowvre-4 placed by adding thesame quantity of new oil to the crank case of the engine.

If desired, after the lter has been used for some time, the entirecartridge can be removed, and a new one substituted for the used one.

In Figures 4 to '7 inclusive I show a modied form of the invention inwhich the only change is metal instead of from a casting, and in theplacing of the filtering pads directly in the casing 50, and thus doingaway with the cartridge. It will also be seen in Figure 4 that the cover5I is secured to the casing 50 by crimping the edges of the two togetheras at 52. In this form of the device the bottom 53,. is made thicker asat 54 in order to receive a plug 5l corresponding to the plug I0. Inlike manner the cover 5I is provided with a thicker portion 56 forreceiving a plug 51 corresponding to the plug 8.

The lowermost screen in this form of the device corresponds with thescreen I3, and is therefore given the same number. The screen I3 restson the shoulder 2. The screen also carries the oil defiector I5.

Deilector rings of the shape shown in Figures 1 and 3, and also shown inperspective in Figure 7 are provided, and the three rings in this formof the device are given the number 58. A ltering pad 59 is placed on thescreen I3 and rests on the deflector I5. It will be noted in this formof the device that the screens 60 are mounted on `top of identical tothat of the ilrst form, and although I have not shown the by-pass 42 inthe pipes 33 and 40, it is obvious that such a by-pass is'to be used onthis form of filter. In order to more clearly show the action of the oilin flowing upwardly past the curved edges 62, I have shown the flow ofoil by arrows 64.

I claim:

1. An automobile oll illter comprising a casing having a cylindricalwall and a closed bottom, a portion oi.' the wall extending from thebottom being of a smaller diameter than the remainder of the wallandforming an outwardly extending shoulder at the juncture of the twoportions, a screen supported by the shoulder, an oil inlet pipeextendingupwardly through the casing bottom and screen and terminating a' shortdistance above the screen, an oil deilector secured to the top of thescreen and covering the inlet pipe, an oil deflecting ring abutting theinner surface of the wall and resting on the screen, said deflectingring having an inwardly curved upper edge for directing the oil flowtoward the casing center, illtering material placed in the ring, ascreen overlying theA ring, a second oil deilecting ring andnlteringmaterial laced on the last named screen, and an oil ou etextending from the casing top.

vthe making of the filter casing 50 out of sheet 2. An automobile oilfilter comprising a casing having an inlet pipe in its bottom and anoutlet pipe at its top, said casing having two shoulders formed therein,a removable cartridge hav/ing a shoulder, a gasket placed on each casingshoulder and supporting the cartridge shoulder and the bottom of thecartridge, a screen extending acrossthe bottom of the cartridc, aueiiecwr 75 vcup-shaped member having a screened bottom lfor bearingagainst the pad and providing an oil receiving compartment, and a casingcover secured to the casing and holding the cartridge in position.

3. In a filter, a casing having a shoulder, a

, ltering pad having its edge extending over the shoulder, a ringpressed into the top of the pad for forcing the pad edge against theshoulder and against the casing wall disposed above the.

shoulder so that the bottom and the side of the ring are enclosed bythel pad, and a cup-shaped member having a screened bottom, said memberbeing disposed within the ring and forming an oil compartment in the topof the casing.

4. A lter comprising a. cylindrical casing formed from sheet vmetal andhaving a shoulder formed therein, the portion of the cylinder above theshoulder being larger in diameter than the portion below the shoulder,an inlet pipe extending into the bottom of the casing, a screensupported by the shoulder and being disposed a slight distance below thetop oi.' the inlet pipe, an oil deiiector carried by the top of thescreen and being disposed above the inlet pipe, filtering materialcovering the screen and deflector, additional filtering means disposedabove the ltering material, a cover crimped to the top of the casing,and an outlet pipe leading from the casing.

' 5. A removable oil filter cartridge comprising a casing having ascreened bottom and a shoulder in its wall, oil deflecting rings placedin the casing and having inwardly curved oil defiecting upper edges,screens extending across the tops of the rings, ltering materialdisposed in the rings, a ltering pad resting on the shoulder, a

ring for clamping the edge of the pad against the casing wall, acup-shaped member disposed in the last named'ring and having a screenedbottom and a cover for the casing and bearing against the last-namedring and cup-shaped member, said cover having an opening therein.

CHARLES A. COMPTON.

